Need Help?

2008 Mitsubishi Lancer DE 4dr Sedan Man

2008 Mitsubishi Lancer
Trim Info:
Front Wheel Drive, 4 Door Sedan, Compact
21 mpg city / 29 mpg hwy
Other Trims
Do you own this car?
Estimated Mileage
 Miles
Enter current mileage for most
accurate info about this vehicle


Track Your Service Records
Get Recall Alerts
Get Updated Value Estimates on Your Car.
back to question list

Ask the Community

Ask Our Auto Mechanics


March 1, 2013, 1:35 pm

Tarig M
 

Question: unusual fall of idle rpm


Hi ,
I am very proud with your car repair videos.I would like to consult you technically about a problem that frequently occurs with my car.
It starts normally .I usually let it 1-2 min.idling, however when I move the car and stop it at traffic light .the rpm falls to below 500rpm for some seconds then it returns to standard idle rpm.This repeats several times,AND NO ILLUMINATION OF CHECK ENGINE WARNING LIGHT .The type of engine is 4G136G2 for mitsubishi lancer 1300 cc GLX.,MPI,MILAGE 47800KM,RECENTLY CHANGED SPARK PLUGS.Ididnt change fuel filter as it is integral part of fuel pump.This tendency didn't occur previously Does dirt falling on the throttle pos.switch and /or idle control motor maybe the reason?please inform with your answer.
Regards
Tarig


March 5, 2013, 11:44 am

Elizabeth K
Expert Mechanic

The IAC (idle air control) valve can get carbon build-up, and should be cleaned. The throttle body should also be cleaned.

http://www.examiner.com/article/replace-clean-and-diagnose-idle-air-control-valve-iacv


0/0 users found this helpful.

Ask our panel of certified auto mechanics a question. We pay for their advice so you don't have to



My Auto Score

See the free AutoCheck score

Meet The Experts
Kim Perrin
Kim Perrin is our resident mechanic here at DriverSide. Kim worked as…
Tyler Orr
Tyler Orr is an expert in German and Japanese cars and has been a mechanic …
Elizabeth Kriesten
Elizabeth Kriesten worked as an automotive technician for several years at Dodge…
Tips on Servicing

Car Brakes: How Do You Know When to Change Them?

By Zach Bowman For those who suffer a daily commute through heavy traffic, your vehicle's braking system can bring thousands of pounds of metal, plastic and empty Starbucks cups to a stop hundreds of times before you get to work. It goes without saying that these pieces wear out, but they do so slowly, meaning you may not notice they need attention until ...

Read more…